110840021 has 4 divisors (see below), whose sum is σ = 111023232. Its totient is φ = 110656812.

The previous prime is 110839999. The next prime is 110840027. The reversal of 110840021 is 120048011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110840021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110840027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90695 + ... + 91908.

It is an arithmetic number, because the mean of its divisors is an integer number (27755808).

Almost surely, 2^110840021 is an apocalyptic number.

It is an amenable number.

110840021 is a deficient number, since it is larger than the sum of its proper divisors (183211).

110840021 is an equidigital number, since it uses as much as digits as its factorization.

110840021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183210.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 110840021 is about 10528.0587479364. The cubic root of 110840021 is about 480.3585587691.

Adding to 110840021 its reverse (120048011), we get a palindrome (230888032).

The spelling of 110840021 in words is "one hundred ten million, eight hundred forty thousand, twenty-one".